초록 ▼

A bulking process for glass fiber strands is provided which allows for increased bulking speed while reducing any decrease in the tensile strength of the bulked glass fiber strand yarn. The process involves conveying treated glass fibers having one or more water soluble, emulsifiable or dispersible

A bulking process for glass fiber strands is provided which allows for increased bulking speed while reducing any decrease in the tensile strength of the bulked glass fiber strand yarn. The process involves conveying treated glass fibers having one or more water soluble, emulsifiable or dispersible thermoplastic materials having a melting or softening point of greater than around 100°F. (37°C.), one or more cationic lubricants and water to a heater to melt or soften the thermoplastic material present on the fibers, bulking the heated glass fiber strand, removing the bulked glass fiber strand at a rate less than the rate of conveyance to bulking, and collecting the bulked glass fiber strand yarn. The treated strand being conveyed to the heater can already be dried or can be wet. After removal from bulking, the glass fiber strand can be treated with a chemical treatment to assist in retarding any additional decrease in tensile strength of the bulked glass fiber strand. The heating of the treated strand can occur before or after the strand is conveyed at a faster rate to bulking than the rate of removal from bulking. The product of the process is a bulked glass fiber strand yarn having a reduced decrease in tensile strength due to bulking.

대표청구항 ▼

A process for preparing texturized strands of glass fibers, comprising: a. conveying at least one treated strand of glass fibers from at least one supply package, where the glass fibers have a coating of an aqueous treating composition present on at least a portion of their surfaces to give the stra

A process for preparing texturized strands of glass fibers, comprising: a. conveying at least one treated strand of glass fibers from at least one supply package, where the glass fibers have a coating of an aqueous treating composition present on at least a portion of their surfaces to give the strand of glass fiber sufficient integrity between the fibers to permit good payout from the supply package, wherein the aqueous treating composition has: 1. at least one heat flowable polymeric material selected from the group consisting of water soluble, dispersible, and emulsifiable heat flowable polymeric materials having at least a softening point of at least around 100°F. (37°C.), 2. cationic lubricant, and 3. water in an amount to give a total solids for the treating composition in the range of about 0.1 to about 20 weight percent, b. heating at least one strand conveyed from at least one supply package to a temperature of at least the softening point of the heat flowable polymeric material present on the fibers in the strand to reduce the integrity of the fibers in the strand to increase the susceptibility of the strand to texturizing, c. feeding the heated strand to texturizing at a first rate of speed, d. texturizing the heated strand by fluid texturizing in a texturizing jet nozzle, e. removing the texturized strand from the jet nozzle at a rate slower than the rate of feeding to the jet nozzle, f. cooling texturized glass fiber strand to resolidify the heat flowable polymeric material to provide integrity to the strand, and g. collecting the texturized glass fiber strand.